Ladda ner årsbok 2008 (6,5 MB) - Polarforskningssekretariatet

from Lamont-Doherty Earth Observatory
studied this complex interaction.
primary production and nutrient budgets
A group from Virginia Institute of Marine
Science concentrated their efforts on understanding
the net primary production in phytoplankton
communities. Apart from measuring
the occurrence of specific phytoplankton
they also studied the sedimentation of carbon,
nitrogen, and silicon to deeper water with
particulates. These processes are important to
supply nutrients for deep-water communities.
Microbiology
The American microbiology group from the
University of Georgia studied the response
of pelagic bacteria to particles in relation to
particle production and composition. Of particular
interest was the influence of bacteria in
turning biological material back to inorganic
nutrients that can be reused by other microbes,
and ascertaining if this may be affected
by climate change.
phytoplankton communities
and climate change
Researchers from the University of South Carolina
ran phytoplankton cultures that were
manipulated to simulate different possible
effects of increasing atmospheric carbon
dioxide concentrations and climate change.
They also studied the effects of a number
Expeditionen oden Southern ocean 2007/08
of factors that limit the growth of algae in
the Southern Ocean, particularly iron and
vitamin B . 12
Bioactive trace metals
Many metals have important biological
functions, and the effect of the metal may
differ dependent on whether it is present
in the water column in a dissolved state
or in particle form. A group from Rutgers
University studied the occurrence and
interrelation of various metals in relation to
phytoplankton and bacterial communities.
Meso- and microplankton
community structure
The carbon flux is substantially affected
by interaction between different species.
Woods Hole scientists counted various
types of plankton with a specially developed
microscope camera, both in surface water
continuously in-line on the seawater intake,
and in deep water on the rosette sampler.
Artists and teachers programme
In addition to the science projects the
expedition also had participation of a Swedish
artist that used the Antarctic environment
as inspiration for his art, and an American
teacher participating in the PolarTREC
(Teachers and Researchers Exploring and
Collaborating) programme.
oden Southern ocean är ett samarbete mellan Polarforskningssekretariatet och det
amerikanska forskningsrådet National Science Foundation (NSF). Grunden för samarbetet
är att NSF chartrar isbrytaren oden av Sjöfartsverket och Polarforskningssekretariatet för
att bryta en isränna till den amerikanska forskningsstationen McMurdo vid Rosshavet, för
att möjliggöra fartygstransporter till stationen. I samband med att oden färdas genom
Södra oceanen får forskarna möjlighet att göra marina undersökningar.
Totalt genomfördes 14 forskningsprojekt under oden Southern ocean 2007/08 varav
hälften utfördes av svenska forskare. De svenska projekten har relevans inom ekologi,
klimatforskning och miljögifter.
Figure 4
The plankton population was
investigated during the expedition.
Photo: Swedish Polar Research
Secretariat
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